We have presented a Green's function method for the calculation
of the atomic mean square displacement (MSD) for an anharmonic
Hamil toni an . This method effectively sums a whole class of
anharmonic contributions to ...

The algebraic expressions for the anharmonic contributions to
the Debye-Waller factor up to 0(A ) and 0 L% ) £ where ^
is the scattering wave-vector] have been derived in a form suitable
for cubic metals with small ion ...

Four problems of physical interest have been solved
in this thesis using the path integral formalism.
Using the trigonometric expansion method of Burton
and de Borde (1955), we found the kernel for two interacting
one ...

/c-(BETS)2FeBr4 is the first antiferromagnetic organic superconductor with successive antiferromagnetic
and superconducting transitions at Ta^=2.5K and Tc=l.lK respectively at
ambient pressure. Polarized reflectance ...

K-(BETS)2FeBr4 is a quasi-2D charge transfer organic metal with interesting electronic and magnetic
properties. It undergoes a transition to an antiferromagnetic (AF) state at ambient pressure at the
Neel temperature ...

This thesis reports on the optical properties of the dilute magnetic semiconductors, Sb1.97 V 0.03 Te3 and Sb1.94Cr0.06Te3, along with the parent compound Sb2Te3' These materials develop a ferromagnetic state at low ...

We developed the concept of split-'t to deal with the large molecules (in
terms of the number of electrons and nuclear charge Z). This naturally
leads to partitioning the local energy into components due to each ...

Formulations of a general bactericidal agent, chlorhexidine, mixed with a phospholipid at
different concentrations are investigated using ^H NMR spectroscopy on a chain-deuterated
lipid analog. Lipid-chlorhexidine ...

The atomic mean square displacement (MSD) and the phonon dispersion
curves (PDC's) of a number of face-centred cubic (fcc) and body-centred
cubic (bcc) materials have been calclllated from the quasiharmonic (QH)
theory, ...

By employing the embedded-atom potentials of Mei et ai.[l], we have calculated the dynamical
matrices and phonon dispersion curves for six fee metals (Cu,Ag,Au,Ni,Pd and
Pt). We have also investigated, within the ...

We study the phonon dispersion, cohesive and thermal properties of raxe gas solids Ne, Ar,
Kr, and Xe, using a variety of potentials obtained from different approaches; such as, fitting
to crystal properties, purely ab ...

In this work, we consider the properties of planar topological defects in unconventional
superconductors. Specifically, we calculate microscopically the interaction energy of domain walls separating degenerate ground ...

SrMg^Rui-iOa thin films were made by using pulsed laser deposition on
SrTiOa (100) substrates in either O2 or Ar atmosphere. The thin films
were characterized by x-ray diffraction, energy dispersive x-ray microanalysis,
dc ...

We prepared samples of MgB2 and ran sets of experiments aimed for investigation of
superconducting properties under pressure. We found the value of pressure derivative
of the transition temperature -1.2 ± 0.05 K/GPa. ...

Pressure variations of the superconducting transition
temperature Ic of a series of amorphous NixZr 1 OO-x alloys have been
studied under quasmydrostatic pressures upto 8 G Pa. For amorphous
samples having Ni-concentration ...

Polycrysttdline samples of NaiCoOa were prepared using the "Rapid heat-up" method. One
set of samples was annealed in flowing O2, while the other set in flowing Argon. X-Ray
diffraction measurements indicated a stable ...

The process of depositing thin films by the use of pulsed laser deposition (PLD) has
become a more widely used technique for the growth of substances in a thin film form.
Pulsed laser deposition allows for the stoichiometric ...

The infinitesimal differential quantum Monte Carlo (QMC) technique is used to
estimate electrostatic polarizabilities of the H and He atoms up to the sixth order
in the electric field perturbation. All 542 different QMC ...